63400451 has 2 divisors, whose sum is σ = 63400452. Its totient is φ = 63400450.

The previous prime is 63400439. The next prime is 63400453. The reversal of 63400451 is 15400436.

It is a happy number.

63400451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63400451 is a prime.

It is a Sophie Germain prime.

Together with 63400453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63400453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31700225 + 31700226.

It is an arithmetic number, because the mean of its divisors is an integer number (31700226).

Almost surely, 2^63400451 is an apocalyptic number.

63400451 is a deficient number, since it is larger than the sum of its proper divisors (1).

63400451 is an equidigital number, since it uses as much as digits as its factorization.

63400451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 63400451 is about 7962.4400154726. The cubic root of 63400451 is about 398.7470187767.

Adding to 63400451 its reverse (15400436), we get a palindrome (78800887).

The spelling of 63400451 in words is "sixty-three million, four hundred thousand, four hundred fifty-one".